|sapə|nāshəs adjective
Etymology: New Latin saponaceus, from Latin sapon-, sapo soap (of Germanic origin) + -aceus -aceous; akin to Old English sāpe soap — more at soap
1. : resembling soap : having the qualities of soap : soapy
2. : liable to slip away : ingratiating but evasive : elusive
• sap·o·na·ceous·ness noun -es